gistfile1.rb

class Chapter < ActiveRecord::Base
  has_attached_file :file,
    :storage => :filesystem

  def to_file
    if Rails.env != "test"
      #open(file.url) {  |f| @content = f.read}
      @content = file.copy_to_local_file.read
      @filename = file_file_name
    else
      @content = "Test content"
      @filename = "Filename"
    end
    result = {
      :filename => @filename,
      :content => @content
    }
  end

end